AGROVOC - FAO’s multilingual thesaurus as a building block for linked open data Gudrun JOHANNSEN 1 , Ahsan MORSHED 1 , Sachit RAJBHANDARI 1 , Armando Stellato 3 ,Thomas Baker 2 ,Margherita SINI 1 and Johannes KEIZER 1 1 FAO of the UN, Italy; 2 WC3-SKOS working group, 3 Universitá di Roma “Tor Vergata”
Presentation given by Johannes Keizer at the UNBIS team of UN Secretariat in New York
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AGROVOC -FAO’s multilingual thesaurus as a building block for linked open data
Gudrun JOHANNSEN1, Ahsan MORSHED1, Sachit RAJBHANDARI1, Armando Stellato 3 ,Thomas Baker 2 ,Margherita SINI1 and Johannes KEIZER1
1FAO of the UN, Italy; 2 WC3-SKOS working group, 3Universitá di Roma “Tor Vergata”
Yes!And Why:
Do we need Thesauri?
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Born as tools to assure consistency in the indexing of library collections
Thesauri were based on “terms”, but terms represented already concepts in a non explicit way
Hierarchical and associative relationships represented generic ontological domain knowledge
Candidate building blocks for the semantic web
Thesauri in the past and now
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03 The Linked Data Universe: http://www.linkeddata.org
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• The Semantic Web isn't just about putting data on the web. It is about making links, so that a person or machine can explore the web of data. With linked data, when you have some of it, you can find other, related, data.
• Like the web of hypertext, the web of data is constructed with documents on the web. However, unlike the web of hypertext, where links are relationships anchors in hypertext documents written in HTML, for data they links between arbitrary things described by RDF,. The URIs identify any kind of object or concept. But for HTML or RDF, the same expectations apply to make the web grow:
• Use URIs as names for things
• Use HTTP URIs so that people can look up those names.
• When someone looks up a URI, provide useful information, using the standards (RDF*, SPARQL)
• Include links to other URIs. so that they can discover more things.
• Simple. In fact, though, a surprising amount of data isn't linked in 2006, because of problems with one or more of the steps. This article discusses solutions to these problems, details of implementation, and factors affecting choices about how you publish your data.
http://www.w3.org/DesignIssues/LinkedData.html
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• http://www.w3.org/2007/Talks/0221-Bangalore-IH/
RDF as a common format for merging data
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03Finding things related to “genes” across databases
Source: Joanne Luciano, Mitre, and the W3C HCLS IG
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Linking DataSets
• Have you seen Thomson Reuters Open Calais Service? ()
• Standard Vocabularies can become the glue between different data sets
• (everything linked through http://aims.fao.org/aos/agrovoc?c_2367#concept)
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SKOS presentation where there is no need to apply any type of relationship between lexical units.
SKOS-XL presentation needs to apply the relationship between lexical units so that it can be understood clearly. This property is compared with OWL inverse property.
SKOS-XL , with the need to define labels as resources, as with concepts, schemes and collections. This defines a special type of lexical entity which is assigned a literal chain which can be repeated for various units. So, the prefLabel and altLabel can be distinguished easily in the multi-lingual thesauri .
SKOS-XL gives more flexible semantic than SKOS for modeling the vocabularies, specially multi-lingual thesaurus like AGROVOC
SKOS and SKOS-XL presentation
The Conceptserver Workbench
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Is a web-based working environment for managing the AGROVOC Concept Server
Facilitate the collaborative editing of multilingual terminology and semantic concept information
It includes administration and group management features
It includes workflows for maintenance, validation and quality assurance of the data pool
The CS is accessible freely to everybody to facilitates collaborative editing
The workbench
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Architecture of the System
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Concept/Term Management
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Concept RelationshipCan create the concept-concept relationshipInverse relationship is also created automatically
• Ex: If we create A affect B, then B is affected by A relationship is also created
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03 Concept Image• Name of the image with
description
• URL will point to the image which will open in an external
• Provide the source of the image
• Can add more translation in different language
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03 Concept Definition
• Add definition to the selected concept
• Add translation in different languages
• Provide the source of the definition
• Creation and modified date are set automatically
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Visualization of concepts and Relationships in the Workbench
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AGROVOC Web Services
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The road map• The AGROVOC concept scheme in it’s
proprietary OWL has been published on June 5, 2010 on version 1.0 of the concept server workbench
• At the moment a patch to version 1.0 of the workbench is developed to make it possible to export AGROVOC SKOS
• AGROVOC SKOS will be published as linked data.
• With version 2.0 of the workbench SKOS will become the native format for AGROVOC
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Giving it a try…….
A demo version of the AWB: http://202.73.13.50:55234/agrovocdevv10d/ With all functionalities, availabe to users for testing purpose.
Latest stable release version 1.0 : (read/write) http://202.73.13.50:55381/agrovocv10i/
Latest stable release version 1.0 (Read only): http://202.73.13.50:55481/agrovocv10i/ (Visitors only with only view privilege)